Fixture joint



July 21, i937. v. FOLLET 2,08%@

FIXTURE JOINT Filed June 10, 1956 .2. /7 j] 2 Mfg/ f 4"* "v/ Patented July 27, 1937 PATENT OFFICE 2,088,321 FIXTURE JOINT Vermont Follet, Elmhurst, ill., assis-nor to Standard Screw Company, Hartford, Conn., a corporation of New Jerse pplication June 10, 1936, Serial No.

3 Claims.

be taken apart without destruction.

Other objects will appear from time to time in 2o the specincation and claims.

e invention is illustrated more or less diagraxnmatically in the accompanying drawing, whereinz- Figure 1 is a longitudinal Asection through one 25 iorm of the joint;

Figure 2 is a similar view with the parts in modled position illustrating the insertion o1' one o1' the holding pins;

opening H and may also have a second angularly disposed threaded perforation l2 within which exterior to assist in perforation I6.

of the parts -in the form of the ted ln Figures 1 to movedvinto the Figure 3 is a view similar to Figure 1, showpositionof Figure 2 in which the perforation-I6 3o ing the pm inserted;v is in line with the perforation 1. e pin 8 ymay Figure 4 is a transverse section taken at line then pass through the perforation I6 tobe seatl-l of Figure 1; ed in the perforation 1 as shown in Figure 3 Figure 5 is a view generally similar to Flgure 1, When so seated it lies within the groove i4 thus illustrating a modiied form, -35 'Figure 6 illustrates the modied form o! Figure 5 with Like parts 40 throughout the speciication and drawing.

45 correspondingly threaded conduit, tube aient member 5.

are designated by like characters The apparatus of the first four figures may be used with or without the side openings 4 and I2 and with or without the end openings 3 and II. Ordinarily, of course, there will be some opening in each of the sections I and I0. There may be two or more openings in each section but the invention is not limited to any particular number of openings. In usual practice an opening is necessary in each section to permit tion of a conduit and another opening may be used to receive a fastening or securing means where the joint is mounted upon or connected to A modified form of the invention is illustrated in Figures 5, 6 and 7, As there shown, one main section I8 is provided with a hollow I9, an interiorly threaded opening in which a conduit or pipe 2 I, correspondingly threaded, may be seated.

The member I8 is reduced as at 24 and provided with a perforation 22 to receive a pin 23. 25 is a second main member of this form of the joint. It may be provided with an internally threaded opening 26 in which an exteriorly threaded pipe or conduit 21 is seated and has formed on its inner face an annular groove 28 within which the pin 23 may project, as shown in Figures 5, 6 and '1. The side wall of the member 25 is pierced as at 29 to receive an inwardly projecting pin 30 which projects into and interrupts the annular groove 28. As illustrated particularly in Figure'7 the two pins in co-operation determine the relative rotational movement possible and limit it to something less than 360.

As shown perforation 22 of the reduced portion 24 of the member I8 is of less diameter than the perforation 29 of the member 25. Thus the original assembly of the parts may be accomplished as follows: First the housing or joint members I8 and 25 are placedin the position shown in Figure 5 in which the perforations 22 and 29 are in register. The pin 23 may be inserted freely through the perforation 29 and is driven to a seat in the perforation 22. Knurling, other form of roughening may be about the exterior of the pin to insure a permanent and tight seat in the perforation 22. After the pin 23 is seated, the parts are moved to the position shown in Figure 6 in which the perforations 22 and 29 are: out of register. The pin 30, which is larger than the pin 29 is then driven or forced to a tight seat in the perforation 29. This pin also may be threaded, knurled or otherwise roughened to insure a tight seat in the perforation 29 and when seated its outer end is ground to conform to the shape of the outer surface of the member 25 to prevent disassembly of the parts and to conceal as far as possible its location. This form of the apparatus has therefore the same general advantages as those mentioned in connection with the earlier form, namely, that the ultimate user cannot locate the joint and cannot take it apart without completely destroying it. It is thus constructed to avoid the danger of being taken apart and reassembled improperly.

The two forms of the device have in common a number of features. An important feature common to the two is that the members which limit the rotational movement of the parts serve also to hold them together, these members comprising the only holding means. Another important feature common to the two forms is that the holding members are invisible and the parts cannot.be disassembled without destructhe conneci diameter than tion and, therefore, cannot be reassembled should a user break or cut them apart. In the form shown in the first four gures one of the limiting members, namely, the pin I5, is or may be held in place not directly by itself but by the fact that it is inserted through the end of the member I9 which end abuts against the member I when the parts are assembled. Therefore this limiting member I5 cannot fall out even though it might be loosely in position. In this form of the invention also the second holding member, namely, the pin 9, holds the two parts of the housing I and I0 together, and it also is, invisible, lying completely inside'of and being spaced inwardly from the outer surface of the member I0. 'Ihus in this form of the device both holding members lie wholly within the joint housing.

I claim:

l. In combination in a joint, a pair of integral, hollow housing members, one having a reduced portion penetrating within the other, the two members when assembled comprising an enclosure, an annular groove formed on the inner surface of the outer member, a perforation perforation formed in the penetrating part of the inner member, in alignment the two parts of th joint are in assembled position, said perforation being of less and extending within the joint, bef

ing inaccessible from the outside and retaining the housing members against axial separation, said pin being smaller in diameter than the pel'- foration in said exterior member and larger in member.

2. In combination in a joint, two members associated togetherA for limited relative rotational movement, one of said members provided with a reduced portion penetrating Within the other, a pin seated within said penetrating member and extending within said groove, said pin being inaccessible from the outside and lying entirely within said joint and holding the two members against sepapin seated in the other member and also extending into said groove, the

two pins adapted to contact with each other and to limit thereby the relative rotation of the two members.

3. In combination in a joint, two members associated together for limited relative rotational movement, one of said members provided with a reduced portion penetrating within the other, a groove in the surrounding member, a pin seatedf within said penetrating member and extending within said groove, said pin being inaccessible from the outside and lying entirely within said joint and holding the two members against separation, and a second pin seated in the other mem-l ber and also extending into said groove, the two pins adapted to contact with each other and to limit thereby the relative rotation of the two members, and a perforation in the outer member through which said. first mentioned pin is in' serted into said penetrating member, when the two members are assembled together.

VERMONT FOLLET.

the perforation in said interiorv 

